Rewind operations require smooth, consistent torque to wind roll of all types of materials. Continuous slip applications also need clutches to efficiently dissipate heat. Nexen® tension control clutches, with closely held flatness and finish tolerances, combined with specific friction materials provide ultimate web tension control. Nexen® Air Champ® Tension Control Clutch, Air Actuated/Spring Return Light/Medium Duty Multi-Caliper Open, 525 in-lb Dynamic Torque, 1800 RPM Maximum, 1 in Bore, Machined Aluminum, 6 in OD x 6.78 in L Dimensions